One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,8)(5,6)(7,10)(11,15)(12,13)(14,16)(33,34,40,44)(35,37,38,41)(36,43,39,42)(45,46,48,47)(2,6)(7,9)(8,13)(14,15)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(33,35)(34,41)(36,45)(37,44)(38,40)(39,48)(42,46)(43,47) involution — undirected(3,10)(4,12)(7,9)(8,13)(17,18,21,24)(19,25,27,22)(20,23,29,28)(26,31,32,30)(33,36,40,39)(34,42,44,43)(35,45,38,48)(37,47,41,46)(1,3,5,10)(2,7,6,9)(4,11,12,16)(8,14,13,15)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,37,40,41)(34,35,44,38)(36,46,39,47)(42,48,43,45)(1,4,5,12)(2,8,6,13)(3,11,10,16)(7,14,9,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(33,38,40,35)(34,41,44,37)(36,45,39,48)(42,47,43,46)(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,39,40,36)(34,43,44,42)(35,45,38,48)(37,47,41,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.